Struct datastore_grpc::google::datastore::v1::Query

pub struct Query {
    pub projection: Vec<Projection>,
    pub kind: Vec<KindExpression>,
    pub filter: Option<Filter>,
    pub order: Vec<PropertyOrder>,
    pub distinct_on: Vec<PropertyReference>,
    pub start_cursor: Vec<u8>,
    pub end_cursor: Vec<u8>,
    pub offset: i32,
    pub limit: Option<i32>,
}

A query for entities.

Fields

projection: Vec<Projection>

The projection to return. Defaults to returning all properties.

kind: Vec<KindExpression>

The kinds to query (if empty, returns entities of all kinds). Currently at most 1 kind may be specified.

filter: Option<Filter>

The filter to apply.

order: Vec<PropertyOrder>

The order to apply to the query results (if empty, order is unspecified).

distinct_on: Vec<PropertyReference>

The properties to make distinct. The query results will contain the first result for each distinct combination of values for the given properties (if empty, all results are returned).

start_cursor: Vec<u8>

A starting point for the query results. Query cursors are returned in query result batches and can only be used to continue the same query.

end_cursor: Vec<u8>

An ending point for the query results. Query cursors are returned in query result batches and can only be used to limit the same query.

offset: i32

The number of results to skip. Applies before limit, but after all other constraints. Optional. Must be >= 0 if specified.

limit: Option<i32>

The maximum number of results to return. Applies after all other constraints. Optional. Unspecified is interpreted as no limit. Must be >= 0 if specified.

Trait Implementations

impl Clone for Query

fn clone(&self) -> Query

Returns a copy of the value.

pub fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Query

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Query

fn default() -> Self

Returns the "default value" for a type.

impl Message for Query

fn encode_raw<B>(&self, buf: &mut B) where
    B: BufMut, 

fn merge_field<B>(
    &mut self,
    tag: u32,
    wire_type: WireType,
    buf: &mut B,
    ctx: DecodeContext
) -> Result<(), DecodeError> where
    B: Buf, 

fn encoded_len(&self) -> usize

Returns the encoded length of the message without a length delimiter.

fn clear(&mut self)

Clears the message, resetting all fields to their default.

pub fn encode<B>(&self, buf: &mut B) -> Result<(), EncodeError> where
    B: BufMut, 

Encodes the message to a buffer.

pub fn encode_length_delimited<B>(&self, buf: &mut B) -> Result<(), EncodeError> where
    B: BufMut, 

Encodes the message with a length-delimiter to a buffer.

pub fn decode<B>(buf: B) -> Result<Self, DecodeError> where
    Self: Default,
    B: Buf, 

Decodes an instance of the message from a buffer.

pub fn decode_length_delimited<B>(buf: B) -> Result<Self, DecodeError> where
    Self: Default,
    B: Buf, 

Decodes a length-delimited instance of the message from the buffer.

pub fn merge<B>(&mut self, buf: B) -> Result<(), DecodeError> where
    B: Buf, 

Decodes an instance of the message from a buffer, and merges it into self.

pub fn merge_length_delimited<B>(&mut self, buf: B) -> Result<(), DecodeError> where
    B: Buf, 

Decodes a length-delimited instance of the message from buffer, and merges it into self.

impl PartialEq<Query> for Query

fn eq(&self, other: &Query) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Query) -> bool

This method tests for !=.

impl StructuralPartialEq for Query